Update setuptools requirement from ~=67.8.0 to ~=68.1.2

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v67.8.0...v68.1.2)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-setuptools~=67.8.0
+setuptools~=68.1.2
 lxml~=4.9.1
 pytz~=2022.7
 pytest-cov~=4.1.0